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    <title>Document</title>
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    <script>
        const obj = {
            name: '东东',
            age: 28
        }
        const o = {}

        const deepClone = (newObj, oldObj) => {
            for (let k in oldObj) {
                // k 属性名 oldObj[k] 属性值
                // newObj[k] ==> 给newObj新增一个属性k 这里k是变量，本身就是字符串
                newObj[k] = oldObj[k]
            }
        }
        deepClone(o, obj)
        console.log(o)
    </script>
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